he will take over the senate seat of the new secretary of state, john kerry. and that means, for the first time in america's 236-year history, we will have two african-american senators serving at one time in the senate. the other is tim scott of south carolina. >>> and from an historic day to a day just short of making history on wall street. the dow has been flirting with a return to the 14,000 mark, on a rocket ride of economic energy. but today, a new report on growth created a speed bump. we wanted to know how serious is it? abc's david muir, here to tell us what he found out today. >> reporter: fascinated, diane, with the race to the 14,000 mark on the dow. something to watch. welcome news for so many boomers. finally seeing their 401(k)s come back. but tonight, the first real bump in some time. look at this. the market closing down. we came so close to that all-time high there, before the crash. 14,164 there. look where we are tonight. we fast forward to current day, so close, 13,910. and tonight, those jittery boomers want to know, can they believe in